The purchase and authenticity of pesticides. Regular and qualified pesticides use packaging materials that are novel, durable, and tightly sealed. There are shock-proof materials between the bottles. The pesticide registration certificate number and product standards are printed on the outside of the packaging box. No., production license number (or production permit number), packaging specifications, toxicity signs, active ingredient content, production factory name, factory address, etc., and are affixed with certificates of conformity and instructions for use, etc. The packaging of counterfeit and inferior pesticides is generally rough and inconsistent, the bottle mouth is not tightly sealed, there is often leakage, and there are few certificates or instructions for use. So, how to correctly choose and identify the authenticity of pesticides? 1. For emulsifiable concentrate pesticides, methods such as shaking, heating, diluting, and smelling can be used to identify them: (1) Shaking method: Observe whether the chemicals in the bottle are stratified. If they are stratified, there will be slick oil on the top and sediment below. , at this time, use force to shake evenly. If it is still stratified after 1 hour of rest, it means it is a fake pesticide. (2) Heating method: For emulsifiable concentrate pesticides with precipitation, place the bottle in hot water, and the water temperature should be hot to the touch. If the precipitation cannot be dissolved in about 1 hour, it is a fake pesticide. (3) Dilution method: For pesticides that do not stratify or precipitate, you can take about 10 ml and put it in a white glass bottle, add 30 ml of water, stir and let it sit for half an hour. Qualified pesticides have no oil floating on the water surface, no sedimentation at the bottom of the water, and the diluted solution is milky white. On the contrary, it is a fake pesticide. In addition, the smell method or the ignition method can also be used to identify. Some criminals put some oil-like things into bottles and pretend to be pesticides. At this time, you can open the bottle cap and smell it gently with your nose. If you can't smell the pesticide, you can conclude that it is a fake pesticide. Some criminals also add a large amount of organic solvents, such as benzene, kerosene, diesel, etc., into qualified pesticides. These pesticides smell like kerosene or diesel. If you pour out a small amount and ignite them on fire, they will burn fiercely and emit a lot of black smoke. 2. Aqueous pesticides: Qualified products have no precipitation, become a uniform liquid after dilution, and have no precipitation and stratification. Fake and inferior products have obvious precipitation, and the liquid liquid stratifies after dilution. 3. Powder pesticides: Qualified products have fine, smooth powder, are easily sprayed out from the duster, and have a distinct odor. If they are wettable powders, they can be evenly suspended in water. Fake and inferior pesticides generally have coarse grains, are not smooth, and have little or no odor. Inferior wettable powders are generally difficult to dissolve in water or will precipitate after adding water. 4. Granular pesticides: Generally, qualified products have uniform particles, a strong smell, and are not easy to change color when placed in water.

The particles of fake and inferior products are uneven, the smell is not strong, or they change color easily in water